api/src/main/java/javax/faces/component/UISelectMany.java - myfaces - Git at Google

 /*
  * Licensed to the Apache Software Foundation (ASF) under one
  * or more contributor license agreements.  See the NOTICE file
  * distributed with this work for additional information
  * regarding copyright ownership.  The ASF licenses this file
  * to you under the Apache License, Version 2.0 (the
  * "License"); you may not use this file except in compliance
  * with the License.  You may obtain a copy of the License at
  *
  *   http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing,
  * software distributed under the License is distributed on an
  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  * KIND, either express or implied.  See the License for the
  * specific language governing permissions and limitations
  * under the License.
  */
 package javax.faces.component;

 import java.lang.reflect.Array;
 import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;

 import javax.faces.application.FacesMessage;
 import javax.faces.context.FacesContext;
 import javax.faces.convert.ConverterException;
 import javax.faces.el.ValueBinding;
 import javax.faces.render.Renderer;

 /**
  * Base class for the various component classes that allow a user to select zero or
  * more options from a set.
  * <p>
  * This is not an abstract class; java code can create an instance of this, configure
  * its rendererType appropriately, and add it to a view. However there is no tag class
  * for this component, ie it cannot be added directly to a page when using JSP (and
  * other presentation technologies are expected to behave similarly). Instead, there
  * is a family of subclasses that extend this base functionality, and they do have
  * tag classes.
  * <p>
  * See Javadoc of <a href="http://java.sun.com/j2ee/javaserverfaces/1.1_01/docs/api/index.html">JSF Specification</a>
  *
  * @JSFComponent
  *   type = "javax.faces.SelectMany"
  *   family = "javax.faces.SelectMany"
  *   desc = "UISelectMany"
  *
  * @author Manfred Geiler (latest modification by $Author$)
  * @version $Revision$ $Date$
  */
 public class UISelectMany extends UIInput
 {
     public static final String COMPONENT_TYPE = "javax.faces.SelectMany";
     public static final String COMPONENT_FAMILY = "javax.faces.SelectMany";
     public static final String INVALID_MESSAGE_ID = "javax.faces.component.UISelectMany.INVALID";

     private static final String DEFAULT_RENDERER_TYPE = "javax.faces.Listbox";

     public UISelectMany()
     {
         setRendererType(DEFAULT_RENDERER_TYPE);
     }

     public String getFamily()
     {
         return COMPONENT_FAMILY;
     }

     public Object[] getSelectedValues()
     {
         return (Object[]) getValue();
     }

     public void setSelectedValues(Object[] selectedValues)
     {
         setValue(selectedValues);
     }

     public ValueBinding getValueBinding(String name)
     {
         if (name == null)
             throw new NullPointerException("name");
         if (name.equals("selectedValues"))
         {
             return super.getValueBinding("value");
         }
         else
         {
             return super.getValueBinding(name);
         }
     }

     public void setValueBinding(String name, ValueBinding binding)
     {
         if (name == null)
             throw new NullPointerException("name");
         if (name.equals("selectedValues"))
         {
             super.setValueBinding("value", binding);
         }
         else
         {
             super.setValueBinding(name, binding);
         }
     }

     /**
      * @return true if Objects are different (!)
      */
     protected boolean compareValues(Object previous, Object value)
     {
         if (previous == null)
         {
             // one is null, the other not
             return value != null;
         }
         else if (value == null)
         {
             // one is null, the other not
             return previous != null;
         }
         else
         {
             if (previous instanceof Object[] && value instanceof Object[])
             {
                 return compareObjectArrays((Object[]) previous,
                                 (Object[]) value);
             }
             else if (previous instanceof List && value instanceof List)
             {
                 return compareLists((List) previous, (List) value);
             }
             else if (previous.getClass().isArray()
                             && value.getClass().isArray())
             {
                 return comparePrimitiveArrays(previous, value);
             }
             else
             {
                 //Objects have different classes
                 return true;
             }
         }
     }

     private boolean compareObjectArrays(Object[] previous, Object[] value)
     {
         int length = value.length;
         if (previous.length != length)
         {
             //different length
             return true;
         }

         boolean[] scoreBoard = new boolean[length];
         for (int i = 0; i < length; i++)
         {
             Object p = previous[i];
             boolean found = false;
             for (int j = 0; j < length; j++)
             {
                 if (scoreBoard[j] == false)
                 {
                     Object v = value[j];
                     if ((p == null && v == null)
                                     || (p != null && v != null && p.equals(v)))
                     {
                         scoreBoard[j] = true;
                         found = true;
                         break;
                     }
                 }
             }
             if (!found)
             {
                 return true; //current element of previous array not found in new array
             }
         }

         return false; // arrays are identical
     }

     private boolean compareLists(List previous, List value)
     {
         int length = value.size();
         if (previous.size() != length)
         {
             //different length
             return true;
         }

         boolean[] scoreBoard = new boolean[length];
         for (int i = 0; i < length; i++)
         {
             Object p = previous.get(i);
             boolean found = false;
             for (int j = 0; j < length; j++)
             {
                 if (scoreBoard[j] == false)
                 {
                     Object v = value.get(j);
                     if ((p == null && v == null)
                                     || (p != null && v != null && p.equals(v)))
                     {
                         scoreBoard[j] = true;
                         found = true;
                         break;
                     }
                 }
             }
             if (!found)
             {
                 return true; //current element of previous List not found in new List
             }
         }

         return false; // Lists are identical
     }

     private boolean comparePrimitiveArrays(Object previous, Object value)
     {
         int length = Array.getLength(value);
         if (Array.getLength(previous) != length)
         {
             //different length
             return true;
         }

         boolean[] scoreBoard = new boolean[length];
         for (int i = 0; i < length; i++)
         {
             Object p = Array.get(previous, i);
             boolean found = false;
             for (int j = 0; j < length; j++)
             {
                 if (scoreBoard[j] == false)
                 {
                     Object v = Array.get(value, j);
                     if ((p == null && v == null)
                                     || (p != null && v != null && p.equals(v)))
                     {
                         scoreBoard[j] = true;
                         found = true;
                         break;
                     }
                 }
             }
             if (!found)
             {
                 return true; //current element of previous array not found in new array
             }
         }

         return false; // arrays are identical
     }

     protected void validateValue(FacesContext context, Object convertedValue)
     {
         Iterator itemValues = _createItemValuesIterator(convertedValue);

         // verify that iterator was successfully created for convertedValue type
         if (itemValues == null)
         {
             _MessageUtils.addErrorMessage(context, this,
                                           INVALID_MESSAGE_ID,
                                           new Object[] {getId()});
             setValid(false);
             return;
         }

         boolean hasValues = itemValues.hasNext();

         // if UISelectMany is required, then there must be some selected values
         if (isRequired() && !hasValues)
         {
             _MessageUtils.addErrorMessage(context, this, REQUIRED_MESSAGE_ID,
                             new Object[] {getId()});
             setValid(false);
             return;
         }

         // run the validators only if there are item values to validate
         if (hasValues)
         {
             _ComponentUtils.callValidators(context, this, convertedValue);
         }

         if (isValid() && hasValues)
         {
             Collection items = new ArrayList();
             for (Iterator iter = new _SelectItemsIterator(this); iter.hasNext();)
             {
                 items.add( iter.next() );
             }
             while (itemValues.hasNext())
             {
                 Object itemValue = itemValues.next();

                 if (!_SelectItemsUtil.matchValue(itemValue, items.iterator()))
                 {
                     _MessageUtils.addErrorMessage(context, this,
                                     INVALID_MESSAGE_ID,
                                     new Object[] {getId()});
                     setValid(false);
                     return;
                 }
             }
         }
     }

     /**
      * First part is identical to super.validate except the empty condition.
      * Second part: iterate through UISelectItem and UISelectItems and check
      *              current values against these items
      */
     public void validate(FacesContext context)
     {
         // TODO : Setting the submitted value to null in the super class causes a bug, if set to null, you'll get the following error :
         // java.lang.NullPointerException at org.apache.myfaces.renderkit._SharedRendererUtils.getConvertedUISelectManyValue(_SharedRendererUtils.java:118)
         super.validate(context);
     }

     protected Object getConvertedValue(FacesContext context,
                     Object submittedValue)
     {
         try
         {
             Renderer renderer = getRenderer(context);
             if (renderer != null)
             {
                 return renderer
                                 .getConvertedValue(context, this,
                                                 submittedValue);
             }
             else if (submittedValue == null)
             {
                 return null;
             }
             else if (submittedValue instanceof String[])
             {
                 return _SharedRendererUtils.getConvertedUISelectManyValue(
                                 context, this, (String[]) submittedValue);
             }
         }
         catch (ConverterException e)
         {
             FacesMessage facesMessage = e.getFacesMessage();
             if (facesMessage != null)
             {
                 context.addMessage(getClientId(context), facesMessage);
             }
             else
             {
                 _MessageUtils.addErrorMessage(context, this,
                                 CONVERSION_MESSAGE_ID, new Object[] {getId()});
             }
             setValid(false);
         }
         return submittedValue;
     }

     private Iterator _createItemValuesIterator(Object convertedValue)
     {
         if (convertedValue == null)
         {
             return Collections.EMPTY_LIST.iterator();
         }
         else
         {
             Class valueClass = convertedValue.getClass();
             if (valueClass.isArray())
             {
                 return new _PrimitiveArrayIterator(convertedValue);
             }
             else if (convertedValue instanceof Object[])
             {
                 Object[] values = (Object[]) convertedValue;
                 return Arrays.asList(values).iterator();
             }
             else if (convertedValue instanceof List)
             {
                 List values = (List) convertedValue;
                 return values.iterator();
             }
             else
             {
                 // unsupported type for iteration
                 return null;
             }
         }
     }
 }
	/*
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*/
	package javax.faces.component;

	import java.lang.reflect.Array;
	import java.util.Arrays;
	import java.util.ArrayList;
	import java.util.Collection;
	import java.util.Collections;
	import java.util.Iterator;
	import java.util.List;

	import javax.faces.application.FacesMessage;
	import javax.faces.context.FacesContext;
	import javax.faces.convert.ConverterException;
	import javax.faces.el.ValueBinding;
	import javax.faces.render.Renderer;

	/**
	* Base class for the various component classes that allow a user to select zero or
	* more options from a set.
	* <p>
	* This is not an abstract class; java code can create an instance of this, configure
	* its rendererType appropriately, and add it to a view. However there is no tag class
	* for this component, ie it cannot be added directly to a page when using JSP (and
	* other presentation technologies are expected to behave similarly). Instead, there
	* is a family of subclasses that extend this base functionality, and they do have
	* tag classes.
	* <p>
	* See Javadoc of <a href="http://java.sun.com/j2ee/javaserverfaces/1.1_01/docs/api/index.html">JSF Specification</a>
	*
	* @JSFComponent
	* type = "javax.faces.SelectMany"
	* family = "javax.faces.SelectMany"
	* desc = "UISelectMany"
	*
	* @author Manfred Geiler (latest modification by $Author$)
	* @version $Revision$ $Date$
	*/
	public class UISelectMany extends UIInput
	{
	public static final String COMPONENT_TYPE = "javax.faces.SelectMany";
	public static final String COMPONENT_FAMILY = "javax.faces.SelectMany";
	public static final String INVALID_MESSAGE_ID = "javax.faces.component.UISelectMany.INVALID";

	private static final String DEFAULT_RENDERER_TYPE = "javax.faces.Listbox";

	public UISelectMany()
	{
	setRendererType(DEFAULT_RENDERER_TYPE);
	}

	public String getFamily()
	{
	return COMPONENT_FAMILY;
	}

	public Object[] getSelectedValues()
	{
	return (Object[]) getValue();
	}

	public void setSelectedValues(Object[] selectedValues)
	{
	setValue(selectedValues);
	}

	public ValueBinding getValueBinding(String name)
	{
	if (name == null)
	throw new NullPointerException("name");
	if (name.equals("selectedValues"))
	{
	return super.getValueBinding("value");
	}
	else
	{
	return super.getValueBinding(name);
	}
	}

	public void setValueBinding(String name, ValueBinding binding)
	{
	if (name == null)
	throw new NullPointerException("name");
	if (name.equals("selectedValues"))
	{
	super.setValueBinding("value", binding);
	}
	else
	{
	super.setValueBinding(name, binding);
	}
	}

	/**
	* @return true if Objects are different (!)
	*/
	protected boolean compareValues(Object previous, Object value)
	{
	if (previous == null)
	{
	// one is null, the other not
	return value != null;
	}
	else if (value == null)
	{
	// one is null, the other not
	return previous != null;
	}
	else
	{
	if (previous instanceof Object[] && value instanceof Object[])
	{
	return compareObjectArrays((Object[]) previous,
	(Object[]) value);
	}
	else if (previous instanceof List && value instanceof List)
	{
	return compareLists((List) previous, (List) value);
	}
	else if (previous.getClass().isArray()
	&& value.getClass().isArray())
	{
	return comparePrimitiveArrays(previous, value);
	}
	else
	{
	//Objects have different classes
	return true;
	}
	}
	}

	private boolean compareObjectArrays(Object[] previous, Object[] value)
	{
	int length = value.length;
	if (previous.length != length)
	{
	//different length
	return true;
	}

	boolean[] scoreBoard = new boolean[length];
	for (int i = 0; i < length; i++)
	{
	Object p = previous[i];
	boolean found = false;
	for (int j = 0; j < length; j++)
	{
	if (scoreBoard[j] == false)
	{
	Object v = value[j];
	if ((p == null && v == null)
	\|\| (p != null && v != null && p.equals(v)))
	{
	scoreBoard[j] = true;
	found = true;
	break;
	}
	}
	}
	if (!found)
	{
	return true; //current element of previous array not found in new array
	}
	}

	return false; // arrays are identical
	}

	private boolean compareLists(List previous, List value)
	{
	int length = value.size();
	if (previous.size() != length)
	{
	//different length
	return true;
	}

	boolean[] scoreBoard = new boolean[length];
	for (int i = 0; i < length; i++)
	{
	Object p = previous.get(i);
	boolean found = false;
	for (int j = 0; j < length; j++)
	{
	if (scoreBoard[j] == false)
	{
	Object v = value.get(j);
	if ((p == null && v == null)
	\|\| (p != null && v != null && p.equals(v)))
	{
	scoreBoard[j] = true;
	found = true;
	break;
	}
	}
	}
	if (!found)
	{
	return true; //current element of previous List not found in new List
	}
	}

	return false; // Lists are identical
	}

	private boolean comparePrimitiveArrays(Object previous, Object value)
	{
	int length = Array.getLength(value);
	if (Array.getLength(previous) != length)
	{
	//different length
	return true;
	}

	boolean[] scoreBoard = new boolean[length];
	for (int i = 0; i < length; i++)
	{
	Object p = Array.get(previous, i);
	boolean found = false;
	for (int j = 0; j < length; j++)
	{
	if (scoreBoard[j] == false)
	{
	Object v = Array.get(value, j);
	if ((p == null && v == null)
	\|\| (p != null && v != null && p.equals(v)))
	{
	scoreBoard[j] = true;
	found = true;
	break;
	}
	}
	}
	if (!found)
	{
	return true; //current element of previous array not found in new array
	}
	}

	return false; // arrays are identical
	}

	protected void validateValue(FacesContext context, Object convertedValue)
	{
	Iterator itemValues = _createItemValuesIterator(convertedValue);

	// verify that iterator was successfully created for convertedValue type
	if (itemValues == null)
	{
	_MessageUtils.addErrorMessage(context, this,
	INVALID_MESSAGE_ID,
	new Object[] {getId()});
	setValid(false);
	return;
	}

	boolean hasValues = itemValues.hasNext();

	// if UISelectMany is required, then there must be some selected values
	if (isRequired() && !hasValues)
	{
	_MessageUtils.addErrorMessage(context, this, REQUIRED_MESSAGE_ID,
	new Object[] {getId()});
	setValid(false);
	return;
	}

	// run the validators only if there are item values to validate
	if (hasValues)
	{
	_ComponentUtils.callValidators(context, this, convertedValue);
	}

	if (isValid() && hasValues)
	{
	Collection items = new ArrayList();
	for (Iterator iter = new _SelectItemsIterator(this); iter.hasNext();)
	{
	items.add( iter.next() );
	}
	while (itemValues.hasNext())
	{
	Object itemValue = itemValues.next();

	if (!_SelectItemsUtil.matchValue(itemValue, items.iterator()))
	{
	_MessageUtils.addErrorMessage(context, this,
	INVALID_MESSAGE_ID,
	new Object[] {getId()});
	setValid(false);
	return;
	}
	}
	}
	}

	/**
	* First part is identical to super.validate except the empty condition.
	* Second part: iterate through UISelectItem and UISelectItems and check
	* current values against these items
	*/
	public void validate(FacesContext context)
	{
	// TODO : Setting the submitted value to null in the super class causes a bug, if set to null, you'll get the following error :
	// java.lang.NullPointerException at org.apache.myfaces.renderkit._SharedRendererUtils.getConvertedUISelectManyValue(_SharedRendererUtils.java:118)
	super.validate(context);
	}

	protected Object getConvertedValue(FacesContext context,
	Object submittedValue)
	{
	try
	{
	Renderer renderer = getRenderer(context);
	if (renderer != null)
	{
	return renderer
	.getConvertedValue(context, this,
	submittedValue);
	}
	else if (submittedValue == null)
	{
	return null;
	}
	else if (submittedValue instanceof String[])
	{
	return _SharedRendererUtils.getConvertedUISelectManyValue(
	context, this, (String[]) submittedValue);
	}
	}
	catch (ConverterException e)
	{
	FacesMessage facesMessage = e.getFacesMessage();
	if (facesMessage != null)
	{
	context.addMessage(getClientId(context), facesMessage);
	}
	else
	{
	_MessageUtils.addErrorMessage(context, this,
	CONVERSION_MESSAGE_ID, new Object[] {getId()});
	}
	setValid(false);
	}
	return submittedValue;
	}

	private Iterator _createItemValuesIterator(Object convertedValue)
	{
	if (convertedValue == null)
	{
	return Collections.EMPTY_LIST.iterator();
	}
	else
	{
	Class valueClass = convertedValue.getClass();
	if (valueClass.isArray())
	{
	return new _PrimitiveArrayIterator(convertedValue);
	}
	else if (convertedValue instanceof Object[])
	{
	Object[] values = (Object[]) convertedValue;
	return Arrays.asList(values).iterator();
	}
	else if (convertedValue instanceof List)
	{
	List values = (List) convertedValue;
	return values.iterator();
	}
	else
	{
	// unsupported type for iteration
	return null;
	}
	}
	}
	}